Feeding device



Sept. 5, 1950 H. GERSTEIN 2,521,360

I FEEDING DEVICE Filed Aug. 24, 1945 2 Sheets-Sheet 1 INVEN TOR.

BY I

H. GERSTEIN FEEDING DEVICE Sept. 5, 1950 2 sheets-sheet 2 Filed Aug. 24,1945 I N VEN TOR.

Patented Sept. 5, 1950 FEEDING DEVICE Harry Gerstein, New York, N. Y.,assignor to Spiral Bagging Machine Corporation, New York, N. Y., acorporation of New York Application August 24, 1945, Serial No. 612,447

7 Claims. (o1. 112-214) An object of the invention is to provide feedingmeans which is calculated to permit the material to be momentarilystopped in its motion, to be treated, and then to be instantly moved ina substantially continuous manner.

A further object of the invention. resides in the provision of meanswhereby the material after it is momentarily stopped for treatment maybe picked up instantly so that there is no substantial interruption inits even smooth movement through the apparatus.

Further and more specific objects, features, and advantages will moreclearly appear from the specification hereinafter especially when takenin connection with the accompanying drawings which illustrate apreferred form which the invention may assume and which form part of thespecification.

In brief and general terms the invention relates to a device in whichsheet material such as textile webbing is to be fed past a treatmentpoint wherein it is acted upon by any suitable device and to be treated.Such treatment may be merely marking the material, or it may beadhesively connecting adjacent folds of the material, or it may involvesewing adjacent edges of the material together. However, whatever thetreatment, it is necessary that, durin the treatment, the material bemomentarily stopped in its motion so as to make the treatment effective.For instance, if the treatment involves sewing, it is necessary that thematerial be stopped long enough for the needle to pass through thematerial in order that the stitch be properly made and the sewing not betorn or the needle broken.

Therefore the device includes at least one pair of feeding devicesdisposed beyond the treatment point and disposed on opposite sides ofthe material to engage with it and pull it past the treatment area. Oneof these feeding devices is connected to the drive of the treatmentmeans to intermittently stop its motion in synchronism with theintermittent motion of the treatment means, but the other feeding deviceis connected to a means for driving it which tends to drive itcontinuously. However, between the 1 second feeding means and itsdriver, a slip clutch is disposed which permits the second feeding meansto stop whenever the first feeding means, with which it is associated,stops in synchronism with the stoppage of the treatment means.Therefore,

as soon as the intermittent stoppage ceases, the continuous drivingmeans is able instantly to pick up the second feeding means and advancethe material and the first feeding means, with a minimum ofinterruption. V

Particularly the device comprises a needle which is to sew adjacentedges of the material together and therefore the material must bestopped long enough for the needle to pass through the material andavoid tearing the goods or breaking the needle. In this respect,therefore, I provide a pair of rollers disposed at a point just beyondthe sewing point and adapted to engage the material on opposite sidesthereof to pull the material past the sewing point. One

. of said rollers is connected to the feed dog operating mechanism, butthe other roller is connected to a motor which tends to drive itcontinuously. However, a slip clutch is disposed between the drivingmotor and the second roller so that, when the first roller stops in itsintermittent motion, the slip clutch will allow the second roller tostop also but also allows the motion of it and the first roller to beresumed instantly as soon as the intermittent stoppage of the firstroller ceases so that there is a minimum of stoppage of the goods. Apresent preferred form of the invention is shown in the accompanyingdrawings of which, Fig. 1 is a plan view of a simple fom of theinvention;

Fig. 2 is an elevational view of the device with the parts broken away;

Fig. 3 is a vertical cross section taken on the line 33 of Fig. 2;

, required to be intermittently and momentarily stopped while it isbeing treated at a given point. Such treatment may be sewing, gluingadjacent edges together, or any other treatment during which thematerial must at least for an instant be stationary.

The drawings show the somewhat diagrammatic representation of a feedingmeans which is related to one form of material-treatin means. In thisform a sewing device which is represented by the needle I0 is operatedby any suitable and usual means. The feed dog operating mechanism hasassociated therewith a linkage designated generally by the numeral l iand adapted to move a clutch member i2 which is of the intermittent balltype adapted to operate a feeding roller l3 which is disposed on theunder side of the material beyond the needle position. This mechanism isso designed in accordance with the usual mechanism that when the needleis passing through the material the clutch will not move the roller [3but otherwise will move it.

On the opposite side of the material is disposed a roller l4 mounted ona. shaft 55 connected to a slip clutch is of any desired type. Thisclutch vention may be limited by the language or scope of any one ormore of the appended claims.

What I claim as my invention is: 1. A device for feeding material whichincludes a plurality of means engaging opposite sides of the material,means for driving one of said engaging means intermittently, meanstending to drive the other of said engaging means continuis driven by achain "5' connected to a .continuously driven motor H. The upper rollerl4 may be pressed into engagement with the lower roller by any suitablemeans such as a spring l8 arranged in any suitable manner to create suchpressure.

From a consideration .of this simple form of the invention, it isreadily perceivable that when the needle is passing through thematerial, the linkage II will not drive the lower roller or feedingmeans !3 and that therefore the material is not at that instant beingadvanced. For the reasons mentioned above this momentary stoppage ishighly desirable. However, at the instant that the needle passes out-ofthe material and the sewing and other treatment has been effected themotion of the rollers on the material to advance it is instantly begunso that except for this momentary stoppage the motion of the materialthrough the device is uninterrupted. In Figs. 4 and 5 is shown amodified form of the invention which varies from the simple form justdescribed only in that the slip clutch is disposed in the connection ata different point and the :parts are associated for the purpose offorming tubular material. In this form the needle or treating means isshown associated'with the rollers 13 and i4 and the shaft of the rollerI4 is connected by a chain H to a shaft 18' associated with anotherroller l9 and between this roller I9 and the chain H is disposed a slipclutch 2i functioning in the same manner as the .slip clutch previouslydescribed. The shaft l8 on which the roller i9 is mounted 'is connectedby a chain 2! to a continuously operating motor 22. This shaft I 8 maybe connected to another chain 23 to operate another roller 26 associatedwith the material to feed it along a predetermined path which may bespiral path in case the device is used for forming tubular bags. In thisform the rollers l9 and 24, are associated with lower rollers not shownwhich engage the under side of the material but are idler rollerspressing the material by any suitable means such as those already shown.

In this manner the material is pulled past the treatment point and isintermittently stopped to permit the treatment to be effective withoutdamaging the material but the instant the material is through beingtreated its motion is immediately picked up so that there is notsubstantial loss in its motion except that required for treatment.

While the invention has been described and set forth with respect to itspreferred form in details it is not intended that it be limited to suchdetails and forms since many changes and modifications may be made inthe invention without departing from the spirit and scope of theinvention in its broadest aspects. Hence it is not desired to limit theinvention to the exact detail forms shown except in so far as theinously, including a slip clutch disposed between the second drivingmeans and the second engaging means to permit the second engaging meansto stop momentarily when the first engaging means stops in itsintermittent motion.

2. A device for feeding material which includes a means forintermittently acting upon said material, a, plurality of feeding meansengaging opposite sides of the material, means for driving one of saidengaging means intermittently in synchronism with the intermittentaction on the material, means tending to drive the other of saidengaging means continuously including a slip clutch disposed betweensaid second driving means and the second engaging means to permit thesecond engaging means to stop momentarily when the first engaging meansstops in its intermittent motion.

3. A device for feeding material which includes a pair of feedingrollers engaging opposite sides of the material, means for driving oneof said rollers intermittently, means tending to drive the other of saidrollers continuously, including a slip clutch disposed between saidsecond driving means and the second roller to permit the second rollerto stop momentarily when the first roller stops in its intermittentmotion.

4. A device for feeding material which includes a means forintermittently acting upon said material, a plurality of feeding rollersengaging opposite sides of the material, means for driving one of saidrollers intermittently in synchronism with the intermittent action onthe material, means tending to drive the other of said rollerscontinuously including a slip clutch disposed between the second drivingmeans and the second roller to permit the second roller to stopmomentarily when the first roller stops in its intermittent motion.

5. A device for feeding material which includes an intermittentlyoperated feed dog mechanism, a plurality of feeding means engagingopposite sides of the material, means for driving one of said feedingmeans intermittently in synchronism with the feed dog mechanism, meanstending to drive the other of said engaging means continuously includinga slip clutch disposed between the said second driving means and thesecond engaging means to permit the second engaging means to stopmomentarily when the first engaging means stops in its intermittentmotion.

6. A device for feeding material which includes an intermittentlyoperated feed dog mechanism, a plurality of feeding rollers engagingopposite sides of the material, means for driving one of said rollersintermittently in synchronism with the feed dog mechanism, means tendingto drive the other of said rollers continuously, including a slip clutchdisposed between the second driving means and the second roller topermit the second roller to stop momentarily when the first roller stopsin its intermittent motion.

7. A device for feeding material which includes an intermittentlyoperated feed dog mechanism, a pair of material-engaging rollersdisposed at a given point to engage opposite sides of the mar terial,means for driving one of said rollers in- 5 termittently in synchronismwith the feed dog mechanism, means tending to drive the other of saidrollers continuously, including a slip clutch disposed between saidsecond driving means and the second roller to permit the second rollerto 5 stop momentarily when the first roller stops momentarily in itsintermittent motion.

HARRY GERSTEIN.

6 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 541,567 McGowan June 25, 1895841,480 Bates Jan. 15, 1907 2,325,643 Weis Aug. 3, 1943

